1 Bar Fels Naptha Soap (or any TRUE bar soap, like Ivory. Not a "cleansing bar" like Dove)
1 cup Borax (20 Mule Team)
1 cup Washing Soda (Arm and Hammer brand, but NOT "baking soda-washing soda is a completely different substance)
1. Grate soap (It will be fine and powdery)
2. Place soap and 2 cups water in saucepan on stove, simmer until soap melted and sixture is clear.
3. Pour 4 gallons HOT water into a 5 gallon bucket, add soap mixture along with rest of ingredients and stir.
4. A thick gel will form at the top, keep stirring periodically until gelled evenly.
Recipe may be halved. Use about 1/4 cup for each laundry load. This detergent will last FOREVER.
Ok, so this sort of intimidated me, and I even watched the process. Then I found out something awesome. If you are OK with powder laundry detergent, you can skip all of the boiling, and you won't need a 5 gallon bucket or anything! Just grate the soap, add the washing soda and borax, and put it all in a blender until it's totally powder. Now you only have store a couple of cups of powder instead of a huge bucket, and it's so concentrated you only need about a tablespoon in each laundry load.
To buy the Borax, Washing Soda, and Fels Naptha (which you shoudl be able to get at any grocery store) will cost you around $10 dollars, but the Borax and Washing Soda can be used for multiple batches, the only thing you will need to buy more of is the Fels Naptha which is the least expensive thing! This is seriously such a money saver and after yesterday, I've decided to try it myself!